Features:1. High-quality ice silk absorbent fabric soft, delicate, windproof, able to maintain warmth, absorb sweat, keep skin dry, Do not fade, shrink.2. Adjustable string design allows you to freely adjust the size according to the head circumference.3. It can be used as wristbands and knee pads, tied to elbows and knees to act as a protective gear.4. Four-needle six-wire seamless stitching makes it more secure.